Butterfly valve with positioning valve seat

Abstract

The butterfly valve with the positioning valve seat comprises a valve body, a valve shaft, the valve seat and a valve plate, the valve shaft is rotatably sleeved on the valve body, the valve plate is fixedly sleeved on the periphery of the valve shaft, the valve seat is sleeved on an inner ring of the valve body, an expansion space is arranged between the inner ring of the valve body and the valve seat, and a feed port is arranged on the valve body. External equipment can fill the expansion space with an expansion medium through the feeding port, the expansion medium is used for reducing the diameter of the inner ring of the valve seat, a positioning ring groove is formed in the inner ring of the valve body, a positioning boss is arranged on the periphery of the valve seat, and the positioning boss can be clamped into the positioning ring groove. According to the butterfly valve with the positioning valve seat, the positioning boss can be clamped into the positioning ring groove so as to improve the installation accuracy between the valve seat and the valve body, the positioning ring groove in the valve body is arranged in the middle, the sealing seat extrudes the valve plate in the implementation process, the valve seat can be driven to deviate when the valve shaft is rotated, the positioning boss is arranged in the positioning ring groove in a matched mode, and therefore the valve seat can be installed more accurately. Valve seat displacement can be prevented, and the use precision is improved.

Description

Technical Field

[0001] The utility model belongs to the field of expansion butterfly valves, and particularly relates to a butterfly valve with a positioning seat. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve. A butterfly valve used for on-off control of a low-pressure pipeline medium refers to a valve in which the closing member (valve flap or butterfly plate) is a disc and rotates around the valve shaft to achieve opening and closing. The butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. The expansion-type seal butterfly valve can reduce the friction between the valve plate and the valve seat and can increase the service life of the valve seat. When the butterfly valve is closed, the outer periphery of the valve plate is extruded into the inner ring of the valve seat, and the inner ring of the valve seat is reduced in diameter by the expansion medium to achieve connection and sealing. During use, the outer periphery of the valve plate will cause certain rubbing on the valve seat, which is likely to cause displacement of the mating surface of the valve seat and result in poor sealing accuracy during repeated use. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a butterfly valve with a positioning seat to solve the problem that the expansion seal valve seat in the prior art is prone to displacement under the extrusion of the valve plate, resulting in poor sealing accuracy during repeated use.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A butterfly valve with a positioning seat includes a valve body, a valve shaft, a valve seat, and a valve plate. The valve shaft is rotatably sleeved on the valve body, and the valve plate is fixedly sleeved on the outer periphery of the valve shaft. The valve seat is sleeved in the inner circle of the valve body. An expansion space is provided between the inner circle of the valve body and the valve seat. The valve body is provided with a feed port, and an external device can fill an expansion medium into the expansion space through the feed port. The expansion medium is used for reducing the diameter of the inner circle of the valve seat. A positioning ring groove is provided in the inner circle of the valve body, and a positioning boss is provided on the outer periphery of the valve seat. The positioning boss can be clamped into the positioning ring groove.

[0006] Further, a U-shaped ring groove is provided on the outer circle of the valve seat, and the inner circle of the valve body is clamped into the U-shaped ring groove, and both ends of the valve body are respectively abutted against the inner side walls of the U-shaped ring groove.

[0007] Further, clamping grooves are respectively provided at both ends of the valve body, and clamping platforms are provided on each inner side wall of the U-shaped ring groove. The outer periphery of the clamping platform is clamped into the clamping groove.

[0008] Further, the positioning boss is located in the U-shaped ring groove.

[0009] Further, a gap is provided between the inner circle of the valve seat and the outer circle of the valve plate.

[0010] Further, the outer periphery of the valve seat can cover the inner circle of the valve body.

[0011] Further, a through hole is provided on the valve seat, and the periphery of the valve shaft is located within the through hole. A sealing seat is arranged within the through hole around the periphery of the valve shaft, and the periphery of the valve shaft is sealingly connected to the inner ring of the sealing seat.

[0012] Compared with the prior art, the butterfly valve with a positioning valve seat of the present utility model has the following beneficial effects:

[0013] (1) For the butterfly valve with a positioning valve seat of the present utility model, the positioning boss can be clamped into the positioning ring groove to improve the installation accuracy between the valve seat and the valve body. Moreover, the positioning boss is located within the U-shaped ring groove, and the positioning ring groove on the valve body is arranged in the middle. The positioning boss and the positioning ring groove are used to position the relative position between the valve seat and the valve body. During implementation, the sealing seat presses against the valve plate. When the valve shaft rotates, it will drive the valve seat to shift. The positioning boss cooperating within the positioning ring groove can prevent the valve seat from shifting and improve the usage accuracy.

[0014] (2) For the butterfly valve with a positioning valve seat of the present utility model, clamping grooves are respectively provided at both ends of the valve body. Clamping platforms are arranged on each inner side wall of the U-shaped ring groove, and the periphery of the clamping platforms is clamped into the clamping grooves. The cooperation between the clamping platforms and the clamping grooves is the cooperation structure between the valve body and the valve seat, which facilitates the staff to install the valve seat in place and improves the assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0016] Figure 1 is a schematic structural diagram of a butterfly valve with a positioning valve seat according to an embodiment of the present utility model;

[0017] Figure 2 is a front view schematic diagram of a butterfly valve with a positioning valve seat according to an embodiment of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the valve shaft according to an embodiment of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the valve seat according to an embodiment of the present utility model;

[0020] Figure 5 is a schematic structural diagram of the valve body according to an embodiment of the present utility model.

[0021] Description of the reference numerals:

[0022] 1 - Valve body; 11 - Feed inlet; 12 - Positioning ring groove; 13 - Clamping groove; 2 - Valve shaft; 21 - Clamping and positioning section; 22 - Bottom socket section; 23 - Shaft body; 3 - Valve seat; 31 - Positioning boss; 32 - U-shaped ring groove; 33 - Clamping table; 34 - Sealing seat; 35 - Annular sealing ring; 4 - Valve plate. Detailed implementation mode

[0023] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0026] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0027] As Figures 1 - 5As shown in the figure, a butterfly valve with a positioning valve seat includes a valve body 1, a valve shaft 2, a valve seat 3, and a valve plate 4. The valve shaft 2 is rotatably sleeved on the valve body 1, and the valve plate 4 is fixedly sleeved around the valve shaft 2. The valve seat 3 is sleeved inside the valve body 1. An expansion space is provided between the inner circle of the valve body 1 and the valve seat 3. The valve body 1 is provided with a feed port 11. An external device can fill an expansion medium into the expansion space through the feed port 11. The expansion medium is used to reduce the diameter of the inner circle of the valve seat 3. A positioning ring groove 12 is provided on the inner circle of the valve body 1. A positioning boss 31 is arranged on the periphery of the valve seat 3. The positioning boss 31 can be clamped into the positioning ring groove 12 to improve the installation accuracy between the valve seat 3 and the valve body 1. A U-shaped ring groove 32 is provided on the periphery of the valve seat 3, and the positioning boss 31 is located in the U-shaped ring groove 32. The positioning ring groove 12 on the valve body 1 is arranged in the middle. The positioning boss 31 and the positioning ring groove 12 are used to position the relative position between the valve seat 3 and the valve body 1. During implementation, the sealing seat 34 presses against the valve plate 4. When the valve shaft 2 rotates, it will drive the valve seat 3 to shift. The positioning boss 31 cooperates in the positioning ring groove 12, which can prevent the valve seat 3 from displacing and improve the use accuracy.

[0028] Clamping grooves 13 are respectively provided at both ends of the valve body 1. Clamping platforms 33 are arranged on each inner side wall of the U-shaped ring groove 32. The periphery of the clamping platform 33 is clamped into the clamping groove 13. The cooperation between the clamping platform 33 and the clamping groove 13 is the cooperation structure between the valve body 1 and the valve seat 3, which facilitates the staff to install the valve seat 3 in place and improves the assembly quality.

[0029] In the natural state, there is a fitting gap between the periphery of the valve plate 4 and the valve seat 3, or the outer edge of the valve plate 4 tends to contact the inner circle of the valve seat 3, reducing or avoiding the wear of parts caused by the outer edge of the valve plate 4 rubbing against the inner circle of the valve seat 3 when the valve plate 4 moves, improving the service life of the device, and improving the stability and reliability of the device.

[0030] When this device is applied to a new energy powder transmission pipeline, the periphery of the valve seat 3 can completely cover the inner circle of the valve body 1 to completely isolate the valve body 1 from the powder in the pipeline, prevent the material of the valve body 1 from contaminating the powder in the conveying pipeline, reduce the requirements for the material of the valve body 1 through this structure, improve production efficiency, and reduce production costs.

[0031] The valve seat 3 is provided with a through hole, and the periphery of the valve shaft 2 is located within the through hole. A sealing seat 34 is arranged within the through hole around the periphery of the valve shaft 2. The periphery of the valve shaft 2 is hermetically connected to the inner ring of the sealing seat 34. The sealing seat 34 is a sealing connection structure between the valve shaft 2 and the valve seat 3, between the valve seat 3 and the valve plate 4, and between the valve seat 3 and the valve body 1. The outer periphery of the sealing seat 34 is adapted to fit into the valve body 1 by extrusion to achieve the sealing performance of this part. The lower end of the sealing seat 34 is adapted to fit into the outer edge of the valve plate 4 by extrusion to achieve the sealing performance of this part. An annular sealing ring 35 is arranged within the inner ring of the sealing seat 34 to achieve the sealing performance between the sealing seat 34 and the periphery of the valve shaft 2. And in order to reduce the manufacturing cost and assembly cost, the sealing seat 34, the valve seat 3 and the annular sealing ring 35 are of an integral structure.

[0032] Due to the setting of the positioning ring groove 12, the structural integrity of the inner ring of the valve body 1 is damaged, and the compressed medium in the expansion space will leak along the periphery of the valve shaft 2 from the positioning ring groove 12. Therefore, two positioning bosses 31 are arranged around the periphery of each sealing seat 34. The two positioning bosses 31 are respectively located on both sides of the sealing seat 34, and the positioning bosses 31 are used to prevent the expansion medium from leaking. During installation, the outer periphery of the sealing seat 34 is extruded with the valve body 1 and the end of the sealing seat 34 is extruded with the valve plate 4, so that the positioning bosses 31 can be extruded into the positioning ring groove 12, making the positioning bosses 31 closely fit into the positioning ring groove 12 to ensure the sealing performance of this part.

[0033] The valve shaft 2 includes a clamping and positioning section 21, and a bottom socket section 22 and a shaft body 23 are respectively arranged at both ends thereof. The bottom socket section 22 is rotatably sleeved on the side wall of the valve body 1. The clamping and positioning section 21 is located within the socket hole in the middle of the valve plate 4, and the clamping and positioning section 21 is clamped into the socket hole. The periphery of the shaft body 23 is rotatably sleeved on the side wall of the valve body 1, and an external actuator is arranged at one end of the shaft body 23. The outer contour of the clamping and positioning section 21 is a polygonal structure, and the lower part of the socket hole is a polygonal contour that cooperates with the clamping and positioning section 21. The upper part of the socket hole is adapted to the outer contour of the shaft body 23, so as to facilitate the periphery of the valve shaft 2 to be clamped into the socket hole to realize the synchronous rotation of the valve plate 4 and the valve shaft 2. During implementation, the outer diameter of the bottom socket section 22 is not greater than the outer dimension of the clamping and positioning section 21, and the outer dimension of the clamping and positioning section 21 is not greater than the outer diameter of the shaft body 23, so that when assembling, one end of the valve shaft 2 is inserted into the valve body 1 through a shaft hole and then penetrates through the valve plate 4 to complete the installation without causing interference.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A butterfly valve with a positioning valve seat, characterized in that: The invention comprises a valve body (1), a valve shaft (2), a valve seat (3) and a valve plate (4); the valve body (1) is rotatably sleeved with the valve shaft (2), and the periphery of the valve shaft (2) is fixedly sleeved with the valve plate (4); the inner ring of the valve body (1) is sleeved with the valve seat (3); an expansion space is provided between the inner ring of the valve body (1) and the valve seat (3); and the valve body (1) is provided with a feed port (11); an external device can fill an expansion medium into the expansion space through the feed port (11); the expansion medium is used to reduce the diameter of the inner ring of the valve seat (3); the inner ring of the valve body (1) is provided with a positioning ring groove (12); a positioning boss (31) is provided on the periphery of the valve seat (3); and the positioning boss (31) can be snapped into the positioning ring groove (12).

2. A butterfly valve with a positioning valve seat according to claim 1, characterized in that: The outer ring of the valve seat (3) is provided with a U-shaped annular groove (32), the inner ring of the valve body (1) is clamped into the U-shaped annular groove (32), and the two ends of the valve body (1) are respectively abutted against the inner side walls of the U-shaped annular groove (32).

3. A butterfly valve with a positioning valve seat according to claim 2, characterized in that: The two ends of the valve body (1) are respectively provided with a clamping groove (13), and a clamping platform (33) is provided on each inner side wall of the U-shaped ring groove (32), and the periphery of the clamping platform (33) is clamped into the clamping groove (13).

4. A butterfly valve with a positioning valve seat according to claim 2, characterized in that: The positioning boss (31) is located in the U-shaped annular groove (32).

5. A butterfly valve with a positioning valve seat according to claim 1, characterized in that: A gap is provided between the inner ring of the valve seat (3) and the outer ring of the valve plate (4).

6. A butterfly valve with a positioning valve seat according to claim 1, characterized in that: The periphery of the valve seat (3) can cover the inner ring of the valve body (1).

7. A butterfly valve with a positioning valve seat according to claim 1, characterized in that: A through hole is provided on the valve seat (3), and the periphery of the valve shaft (2) is located in the through hole. A sealing seat (34) is provided on the periphery of the valve shaft (2) and in the through hole, and the periphery of the valve shaft (2) is sealingly connected to the inner ring of the sealing seat (34).

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